1524 Joensuu

1524 Joensuu
Discovery
Discovered by	Y. Väisälä
Discovery site	Turku Obs.
Discovery date	18 September 1939
Designations
MPC designation	(1524) Joensuu
Named after	Joensuu (Finnish town)
Alternative designations	1939 SB · 1931 EL; 1933 QO · 1936 DG; 1958 DH1
Minor planet category	main-belt · (outer)
Orbital characteristics
	Epoch 4 September 2017 (JD 2458000.5)
	Uncertainty parameter 0
Observation arc	85.95 yr (31,395 days)
\|{{{apsis}}}\|helion}}	3.4881 AU
\|{{{apsis}}}\|helion}}	2.7300 AU
Semi-major axis	3.1090 AU
Eccentricity	0.1219
Orbital period	5.48 yr (2,002 days)
Mean anomaly	88.699°
Mean motion	0° 10m 47.28s / day
Inclination	12.687°
Longitude of ascending node	347.72°
\|{{{apsis}}}\|helion}}	2.7611°
Physical characteristics
Dimensions	39.37±12.22 km; 42.79±1.1 km; 42.83 km (derived); 44.87±0.78 km; 45.056±0.291 km; 49.394±0.502 km
Rotation period	9.276±0.007 h
Geometric albedo	0.0347±0.0053; 0.043±0.002; 0.0462±0.002; 0.050±0.008; 0.0505 (derived); 0.064±0.007; 0.07±0.05
Spectral type	C
Absolute magnitude (H)	10.56±0.50 · 10.60 · 10.7 · 10.78 · 10.8

Short description: Asteroid

1524 Joensuu, provisional designation 1939 SB, is a carbonaceous asteroid from the outer region of the asteroid belt, approximately 42 kilometers in diameter. It was discovered on 18 September 1939, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland, and named for the town of Joensuu.^[12]

Classification and orbit

Joensuu is a dark C-type asteroid, that orbits the Sun in the outer main-belt at a distance of 2.7–3.5 AU once every 5 years and 6 months (2,002 days). Its orbit has an eccentricity of 0.12 and an inclination of 13° with respect to the ecliptic.^[1] In 1931, Joensuu was first identified as 1931 EL at Heidelberg Observatory, extending the body's observation arc by 8 years prior to its official discovery observation.^[12]

Physical characteristics

In October 2005, a rotational lightcurve of Joensuu was obtained from photometric observations by French amateur astronomer Laurent Bernasconi. It gave a well-defined rotation period of 9.276 hours with a change in brightness of 0.33 magnitude ({{{1}}}).^[9]

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Joensuu measures between 39.37 and 49.39 kilometers in diameter, and its surface has an albedo between 0.034 and 0.07.^[4]^[5]^[6]^[7]^[8] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0505 and a diameter of 42.83 kilometers using an absolute magnitude of 10.7.^[3]

Naming

This minor planet was named for the Finnish town Joensuu, where the discoverer received his early schooling. It is located in North Karelia, near the Russian border.^[2] The official naming citation was published by the Minor Planet Center on 20 February 1976 (M.P.C. 3929).^[13]

References

↑ ^1.0 ^1.1 ^1.2 ^1.3 "JPL Small-Body Database Browser: 1524 Joensuu (1939 SB)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001524. Retrieved 30 June 2017.
↑ ^2.0 ^2.1 Schmadel, Lutz D. (2007). "(1524) Joensuu". Dictionary of Minor Planet Names – (1524) Joensuu. Springer Berlin Heidelberg. p. 121. doi:10.1007/978-3-540-29925-7_1525. ISBN 978-3-540-00238-3.
↑ ^3.0 ^3.1 ^3.2 ^3.3 ^3.4 ^3.5 "LCDB Data for (1524) Joensuu". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1524|Joensuu. Retrieved 31 December 2016.
↑ ^4.0 ^4.1 ^4.2 ^4.3 Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T. et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal 152 (3): 12. doi:10.3847/0004-6256/152/3/63. Bibcode: 2016AJ....152...63N.
↑ ^5.0 ^5.1 ^5.2 ^5.3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode: 2004PDSS...12.....T. https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab. Retrieved 22 October 2019.
↑ ^6.0 ^6.1 ^6.2 ^6.3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U. (online, AcuA catalog p. 153)
↑ ^7.0 ^7.1 ^7.2 ^7.3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C. et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters 759 (1): 5. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M. Retrieved 31 December 2016.
↑ ^8.0 ^8.1 ^8.2 ^8.3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D. et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M.
↑ ^9.0 ^9.1 Behrend, Raoul. "Asteroids and comets rotation curves – (1524) Joensuu". Geneva Observatory. http://obswww.unige.ch/~behrend/page4cou.html#001524. Retrieved 31 December 2016.
↑ Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R. et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal 791 (2): 11. doi:10.1088/0004-637X/791/2/121. Bibcode: 2014ApJ...791..121M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M. Retrieved 16 December 2016.
↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus 261: 34–47. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 31 December 2016.
↑ ^12.0 ^12.1 "1524 Joensuu (1939 SB)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1524. Retrieved 31 December 2016.
↑ Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7. Bibcode: 2009dmpn.book.....S. https://archive.org/details/dictionaryminorp2008schm.

External links

Asteroid Lightcurve Database (LCDB), query form (info )
Dictionary of Minor Planet Names, Google books
Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
1524 Joensuu at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
1524 Joensuu at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

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Original source: https://en.wikipedia.org/wiki/1524 Joensuu. Read more

[jpldata-1] 1.0 ^1.1 ^1.2 ^1.3 "JPL Small-Body Database Browser: 1524 Joensuu (1939 SB)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2001524. Retrieved 30 June 2017.

[springer-2] 2.0 ^2.1 Schmadel, Lutz D. (2007). "(1524) Joensuu". Dictionary of Minor Planet Names – (1524) Joensuu. Springer Berlin Heidelberg. p. 121. doi:10.1007/978-3-540-29925-7_1525. ISBN 978-3-540-00238-3.

[lcdb-3] 3.0 ^3.1 ^3.2 ^3.3 ^3.4 ^3.5 "LCDB Data for (1524) Joensuu". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=1524|Joensuu. Retrieved 31 December 2016.

[Nugent-2016-4] 4.0 ^4.1 ^4.2 ^4.3 Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T. et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal 152 (3): 12. doi:10.3847/0004-6256/152/3/63. Bibcode: 2016AJ....152...63N.

[SIMPS-5] 5.0 ^5.1 ^5.2 ^5.3 Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode: 2004PDSS...12.....T. https://sbnarchive.psi.edu/pds3/iras/IRAS_A_FPA_3_RDR_IMPS_V6_0/data/diamalb.tab. Retrieved 22 October 2019.

[AKARI-6] 6.0 ^6.1 ^6.2 ^6.3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U. (online, AcuA catalog p. 153)

[Masiero-2012-7] 7.0 ^7.1 ^7.2 ^7.3 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C. et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters 759 (1): 5. doi:10.1088/2041-8205/759/1/L8. Bibcode: 2012ApJ...759L...8M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2012ApJ...759L...8M. Retrieved 31 December 2016.

[WISE-8] 8.0 ^8.1 ^8.2 ^8.3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D. et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M.

[geneva-obs-9] 9.0 ^9.1 Behrend, Raoul. "Asteroids and comets rotation curves – (1524) Joensuu". Geneva Observatory. http://obswww.unige.ch/~behrend/page4cou.html#001524. Retrieved 31 December 2016.

[Masiero-2014-10] Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R. et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal 791 (2): 11. doi:10.1088/0004-637X/791/2/121. Bibcode: 2014ApJ...791..121M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2014ApJ...791..121M. Retrieved 16 December 2016.

[Veres-2015-11] Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus 261: 34–47. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 31 December 2016.

[MPC-Joensuu-12] 12.0 ^12.1 "1524 Joensuu (1939 SB)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=1524. Retrieved 31 December 2016.

[DoMP-Circular-dates-13] Schmadel, Lutz D. (2009). "Appendix – Publication Dates of the MPCs". Dictionary of Minor Planet Names – Addendum to Fifth Edition (2006–2008). Springer Berlin Heidelberg. p. 221. doi:10.1007/978-3-642-01965-4. ISBN 978-3-642-01964-7. Bibcode: 2009dmpn.book.....S. https://archive.org/details/dictionaryminorp2008schm.